Palladium-Mediated Intramolecular Aryl Amination on Furanose Derivatives: An Expedient Approach to the Synthesis of Chiral Benzoxazocine Derivatives and Tricyclic Nucleosides
作者:Arpita Neogi、Tirtha Pada Majhi、Ranjan Mukhopadhyay、Partha Chattopadhyay
DOI:10.1021/jo052420i
日期:2006.4.1
arylamination on sugar derivatives has been accomplished by using bulky biaryl phosphine ligands. An application of this methodology on a variety of d-glucose-derived substrates, 2a−f, led to the synthesis of highly functionalized cis-fused tricyclic oxazocines, 3a−e. The products could subsequently be transformed to the optically active benzoxazocine derivative 4 and tricyclic nucleoside 6. This is the first
糖衍生物上钯催化的分子内芳基化反应是通过使用庞大的联芳基膦配体完成的。该方法在各种衍生自d-葡萄糖的底物2a - f上的应用导致了高度官能化的顺式稠合三环恶唑啉3a - e的合成。产物随后可以转化为旋光的苯并恶唑啉衍生物4和三环核苷6。这是通过呋喃糖衍生物的分子内环胺化合成八元环的第一个实例,这为中环杂环的催化合成提供了非常有用的方法。